KMS Shanghai Institute of Ceramics,Chinese Academy of Sciences
New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2 | |
Wang, Lujie1,2; Qi, Qian1; Cai, Ping1; Zhang, Hui1; Yang, Xiao1; Liu, Xuejian1; Jiao, Zheng2; Huang, Zhengren1 | |
2017 | |
Source Publication | Scripta Materialia
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ISSN | 13596462 |
Volume | 126Pages:11-14 |
Abstract | Silicon nitride (Si3N4) ceramics were pressureless sintered with 0.2 wt% FeSi2at 1780 °C for 2 h in nitrogen with Al2O3and Y2O3as sintering aids and found to have high toughness and strength. During the sintering process, β-Si3N4crystal seeds and Fe5Si3reinforcing particles were in situ generated by FeSi2. Abnormal growth of Si3N4grains was promoted by β-Si3N4crystal seeds. High thermal expansion coefficient of Fe5Si3particles induced residual stresses in the ceramics matrix, which deflected the crack. Ultimately, the fracture toughness and flexural strength of Si3N4ceramics reached 9.8 ± 0.5 MPa·m1/2and 1086 ± 48 MPa respectively. © 2016 Acta Materialia Inc. |
DOI | 10.1016/j.scriptamat.2016.08.012 |
EI Accession Number | 20163402730313 |
EI Keywords | Fracture toughness |
EI Classification Number | 804 Chemical Products Generally - 804.2 Inorganic Compounds - 812.1 Ceramics - 951 Materials Science |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.sic.ac.cn/handle/331005/25927 |
Collection | 中国科学院上海硅酸盐研究所 |
Affiliation | 1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai; 200050, China; 2.College of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China |
Recommended Citation GB/T 7714 | Wang, Lujie,Qi, Qian,Cai, Ping,et al. New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2[J]. Scripta Materialia,2017,126:11-14. |
APA | Wang, Lujie.,Qi, Qian.,Cai, Ping.,Zhang, Hui.,Yang, Xiao.,...&Huang, Zhengren.(2017).New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2.Scripta Materialia,126,11-14. |
MLA | Wang, Lujie,et al."New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2".Scripta Materialia 126(2017):11-14. |
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